Nortec Industries Humidifier MHB User Manual

Evaporative Humidifier / Cooler Nortec MH Series  
Is a sustainable solution for both humidifying and cooling. Nortec’s MH series is an evaporative humidifier based on the adiabatic  
principle that results in air humidifying and cooling. Its innovative design is specifically engineered for Air Handing Units (AHU) or  
ventilation duct systems and is a perfect compliment towards GREEN/LEED building design.  
Model MHB Flow On/Off  
The water is not collected in the water tray in the case of the “flow” model, but rather flows directly into the drain. The low-energy  
Nortec MH evaporation humidifier/cooler is specially designed for integration in central air conditioning systems.  
Nortec MH characteristics at a glance:  
Humidifier media box made of polyester free of glass fibre with an impressed V-Profile for an efficient and healthy way  
of humidifying and cooling  
Simple and uncomplicated installation  
Low installation and operational costs for short and long-term facility cost reductions  
Short water basin depth made of stainless steel material with multi-sided gradients for effective drying of the  
humidifier.  
Water management integrated in the MH control system unit for optimising water consumption and humidity control  
Operation for all water quality types: potable, softened, reverse osmosis (R/O) and fully-de-ionized (D/I) water  
Adiabatic evaporation cooling of over 21.5° F (12°C) can be achieved  
Ultra violet water treatment available  
The electronic control is an integral part of the humidifier. It enables operation free of malfunctions and optimises control accuracy  
and water consumption.  
The short stainless steel water tank depth will reduce on the overall footprint, saving valuable air handling real estate. There are  
lateral two guide tracks with suspension fixtures for the humidifier media boxes and mist eliminators to be easily installed.  
Integrated water management system consists of water distributors with flow regulators for setting consistent water flow volumes,  
a circulation pump, stainless steel water distribution hoods, electrical inlet valves, electrical step control valves and electronic  
control for optimum water efficiency and humidity control.  
Humidifying Media Box  
The core element of the MH series is the patented polyester media box located in the air duct. Dry air flows through the box, water  
flows over the hygroscopic media and the extremely large wet surface releases humidity to the air. This method enables air  
humidifying or cooling with substantially limiting the use of electrical energy.  
The V-Profile humidifier box consists of a polyester material with an impressed V-Profile, which enables a more intensive  
exchange of air and water. The polyester box is free of glass fibre and is fire protected in compliance with UL 900 Class 1  
certification. This not only makes it perfectly safe with regards to health, but also ensures a longer service life compared to the  
rational cellulose or fibre glass media.  
V-Profile Media  
Media Box  
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Available Options and Accessories  
UV water treatment  
Pressure reduction valve (building side) consult factory  
P/N 1329505 - In-Line Water filter c/w 5 micron filter  
Nortec On/Off Controls:  
P/N 2520273 - On/Off Dig. Duct Humidistat pkg  
P/N 2520259 - On/Off Digital Wall Humidistat  
P/N 1329203 - Switch Air Proving (duct airflow safety interlock)  
Nortec LINKS2 and Nortec Online please consult factory  
MHB Flow Technical data  
Humidifying output  
Power consumption w/UV  
Power consumption w/o UV  
Primary voltage  
Control voltage  
Water mains pressure  
Water connection  
see performance data  
0.30  
0.20  
kW  
kW  
120/1/60  
24 Vac On/Off  
30..145  
3/4  
V/Ph/Hz  
psi  
"
Water drain  
1 ½  
Width/Height/Depth  
See performance data  
Make  
Type  
Nortec  
MHB Flow  
Manufacturer Walter Meier Climate Canada Inc.  
17.61  
16.75  
12.00  
14.31  
(TC) Total Controller System Mounting Dimensions  
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MH Wiring Diagram  
13  
18 19  
12  
3 4 6  
X5  
N
N
17  
F4  
(200  
mA)  
UV Lamp  
Drain Valve  
Inlet Valve  
16  
14  
X6  
11  
N
10  
9
Stage 3  
Stage 2  
Stage 1  
F3  
(630  
mA)  
8
F1  
(6.3 A)  
F2  
(1.0 A)  
X7  
N
Pump  
X1  
0
X1  
1
X9  
Main Switch  
6.25A  
120/24  
Vac  
2 3  
R1  
4
Internal  
External  
Internal  
External  
L1  
N
1
2
3
4
5
6
8
9 10 11 121314151617 18  
27  
2021 222324 2526  
7
5
1
Primary  
Terminal  
Block  
Stage 1 Valve  
Stage 2 Valve  
Optional UV Lamp  
Stage 3 Valve  
Max. Level  
Inlet Valve  
Drain Valve  
Inlet Water Pressure Switch  
Hydraulic Unit  
MH Series (120 Vac)  
FLOW INTERNAL WIRING DIAGRAM  
Diagram No. 2543942 Rev. A Nov. 25, 2008  
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Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Installation  
Installation of the MH is simple and uncomplicated. The stainless steel water tank and lateral side supports can be integrated into  
a ventilation duct or air handling unit very quickly. The media boxes can be mounted in the simplest of manners and only three  
connections are needed, the supply inlet water valve, drain water valve and all electrical/control connections. The Flow model  
incorporates a 120V single phase connection.  
Typical MH installation. Use as reference only. MHTC REflow shown.  
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